Well, okay, I've figured it out...
When using Google's SMTP service, it'll automatically put a copy in
your mail. Since it's from you, it'll also automagically show up in
your Sent Mail folder. If it matches any of your filters, those will
be applied as well, additionally labeling the message (causing it to
show up in those folders when viewed by IMAP.
So, if I want to get the copy from the mailing list, instead of having
Google squelch it because a message of that same Message-Id already
exists, I need to not send through Google's SMTP service _and_ not
save a copy in my Sent Mail folder via my IMAP client.
Further testing has proven that if I use a non-Google SMTP server, and
a mail I send still gets to my mail account (either I'm a recipient,
or on the mailing list), Google will _still_ throw a copy in my Sent
Mail folder if the From: header matches my account address, just like
Guillermo said.
And, as Dave mentioned, additional copies uploaded via IMAP are not
squelched, even though additional copies via remote delivery are.
So, behavior figured out. Thanks!
Gregory
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Gregory K. Ruiz-Ade <[EMAIL PROTECTED]>
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